The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 18, 1989
Filed:
Apr. 19, 1988
Hiroshi Satoh, Stanford, CA (US);
Toshimi Abo, Kanagawa, JP;
Abstract
A system and method for controlling an ignition timing for an internal combustion engine, in which a basic ignition timing angle determined according to an engine operating condition is corrected according to an MBT (Minimum Spark Angle for Best Torque) correction quantity within a range of a predetermined limited value set for the MBT correction quantity, and the ignition timing angle is corrected within the predetermined limit range on the basis of one of knock correction quantity (calculated for suppressing the knock correction quantity to fall in a predetermined level) and the MBT correction quantity (calculated for correcting the instantaneous ignition timing angle so that a maximum internal cylinder pressure coincides with a target angular position at which a magnitude of engine output torque becomes maximum) which is placed at a more retardation angle side.